Building The Ultimate Delta Pulse using KT315 pcb

[jladre]

hello again!! i've read at thunting a post that:
BC557 must be BC557C
BC546 must be BC546B

is this true?
can u confirm?

All parts works with substitute..i've always done that.. like carl said any parts that with almost the same or having closer specification will work..
Maybe the purpose of thunting is have a precise parts for the circuit but there are also some parts hat work also.

[tomari]

i know that it will work with different versions but the concept here is to squize every little potential out of this built.

so is there any need to use BC557C and BC546B explicitly? i know there is different amplfication betwin A B and C versions

[kt315]

VT2 and VT3 are in a state 'turn out' almost always. they are like as 'in not working state'.
only in time, those are very rare cases at field, of 'huge metal/target near coil' they turn up and serve like protective
circuit from THE overloading of primary opamp. no especial difference what transistors you will use - either with C or B
they will work equally.

[tomari]

kt315 what about VT4-5-6-7-8 and 9 ?

[kt315]

all useful data was accumulated in Part List/Bill of the Material. if anybody want to add/change anything in it write me and I will take it for approval.

DP_part_list.txt

[mohandes]

VT2 and VT3 are in a state 'turn out' almost always. they are like as 'in not working state'.
only in time, those are very rare cases at field, of 'huge metal/target near coil' they turn up and serve like protective
circuit from THE overloading of primary opamp. no especial difference what transistors you will use - either with C or B
they will work equally.

i see it before ,bc557better and bc54b.
so if we should get better dp should work on better than lf357 and RL part .
so i use instead all jumper 0ohm res.
so about cap change like kt315(250volts)and use best mark like wima or mkt or mkp.
what do you think about 1n60?
tlc277 and tl072 , so i am not sure which is better.

DEAr kt315 , i want make 2*2meter coil for dp,can you tell me more information.i use cate6e better or 0.75mm wire?( i want search large metal between 4 to 5 meter( i am not sure, is it possible)
regards

[kt315]

do 2*2meter coil from cate 6 cable (one turn I think will enough) and tell us an result =)

[mohandes]

do 2*2meter coil from cate 6 cable (one turn I think will enough) and tell us an result =)

i makecoil 1.45*1.45meter and get 446mkh and 2,8ohm, so if make 2*2meter coil i think get near 700 too 800mkh and near 4ohm, so it will ok.just should test but i can not test to my country
regards

[kt315]

tell to your neighbour that by the device you find out the water source and will get the alibi =)

[mohandes]

tell to your neighbour that by the device you find out the water source and will get the alibi =)

yeah maybe dp2 can detect by 2meter coil 110*110*50cm metal box near 4 to 4.5meter in the soil.

[tomari]

KT315, i cleaned up my electronics stuff and i found these chips:

TL062
TL072
TLE2062
TLE2072

do you think it is best to use the TL072 , TLE20*2 as an upgrate or just stay in the master plan of TL062 ?
are the better offset voltage, GBW, and slew rate characteristics of the *other than TL062* chips, really needed?

i even found a meteorological balloon in my stuff, man wtf??? i dont remember how i got it!!!

[kt315]

this is only datasheest, nothing more my friend. first words you see there.

The TLE206x series of low-power JFET-input operational amplifiers doubles the bandwidth of the earliergeneration TL06x and TL03x BiFET families without significantly increasing power consumption. TexasInstruments Excalibur process also delivers a lower noise floor than the TL06x and TL03x. On-chip zenertrimming of offset voltage yields precision grades for dc-coupled applications. The TL206x devices arepin-compatible with other TI BiFETs; they can be used to double the bandwidth of TL06x and TL03x circuits,

or to reduce power consumption of TL05x, TL07x, and TL08x circuits by nearly 90%.
-----

The TLE207x series of JFET-input operational amplifiers more than double the bandwidth and triple the slewrate of the TL07x and TL08x families of BiFET operational amplifiers. Texas Instruments Excalibur processyields a typical noise floor of 11.6 nV

/Hz, 17-nV//Hz ensured maximum, offering immediate improvement innoise-sensitive circuits designed using the TL07x. The TLE207x also has wider supply voltage rails, increasingthe dynamic signal range for BiFET circuits to ±19 V. On-chip zener trimming of offset voltage yields precisiongrades for greater accuracy in dc-coupled applications. The TLE207x are pin-compatible with lower

performance BiFET operational amplifiers for ease in improving performance in existing designs.

[tomari]

yes i've read these, and according to datasheet and description of TI, TLE2072 is the best way to go. But is it in practice? maybe the circuit needs some kind of compesation for these "better" ics?
i have these thought because the second turkish DP i've built was very unstable, yet using TLE2072. But it had other problems too, like old version PCB (2007) and crappy rails (made at home), while i was testing on air i did not see any improvement over the TL062 but i dont know if the other problems limited the potential of these ICs

[kt315]

russians say 'vam schashechki ili ehat?'. i translate - do you need a chequer or to drive? here chequer is the image on a taxi, at its top or at its side.
seems you choice the chequer...

[tomari]

wise quote my friend, i dont have the pcb yet so i can make only assumptions and some technical blah blah with the gurus, i always read at the forums about these chips, that they have better specs etc, but i havent seen one test result:

"i compared TL062 and TLE2072 and wow more stability and +3cm"

i have to post one result:

"i compared TL062 with TL072 and TLE2072 but i did not any better results, yet my pcb was **** and i dont know if this limited my perception"

so master yoda KT, did u make any test and have any personal experience?

some times its just the mind, knowing that someone uses a "better ic" he wants to believe "better stability, longer detection" but i know your opinion is justified and you can say "no, it makes no difference" even if a little voice inside your head wants to say the oposite.

except of that, i dont want to use sockets for the ICs on this pcb, and if this test is already done, i dont want to degrade the pcb with soldering again and again different ics to test.
if this test is not done, i can solder the sockets and test all the ics, then desolder the sockets and solder the best ics then.
soldering desoldering and testing is when **** happens my friend, i must avoid tests that has been done before!